Perl compiler backend that generates a cross-reference listing of variables, subroutines, and formats in a Perl program. Results are grouped by file, then subroutine, then package, then objects within the package with line numbers. The line numbers are given as a comma-separated list. A line number may be preceded by one of the following code letters:
Invoke B::Xref like this:
perl -MO=Xref[,options] program
program is the Perl program whose cross-reference you want. Options are separated by commas and follow normal backend option conventions. The possible options are:
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